rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2628 jiffies s: 589 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5060 Comm: kworker/0:4 Not tainted 6.7.0-rc4-syzkaller-00843-g1674110c0dd4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: events linkwatch_event
RIP: 0010:netif_running include/linux/netdevice.h:3698 [inline]
RIP: 0010:linkwatch_urgent_event+0x18/0x380 net/core/link_watch.c:107
Code: 48 c7 c7 c0 02 a7 8c e8 a6 9b 67 f9 eb aa 0f 1f 40 00 41 57 41 56 41 55 41 54 55 53 48 89 fb 4c 8d ab 48 01 00 00 48 83 ec 08 <e8> 23 be 10 f9 be 08 00 00 00 4c 89 ef e8 f6 a1 67 f9 4c 89 ea 48
RSP: 0018:ffffc9000414fc10 EFLAGS: 00000082
RAX: 0000000000000000 RBX: ffff888016b58000 RCX: ffffffff8876e316
RDX: ffff888014ed5940 RSI: ffffffff8876e320 RDI: ffff888016b58000
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000003 R12: 00000000000000bd
R13: ffff888016b58148 R14: ffff888016b58000 R15: ffff888016b586b0
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6b6bcc35c0 CR3: 000000006947e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __linkwatch_run_queue+0xd8/0x460 net/core/link_watch.c:224
 linkwatch_event+0x8f/0xc0 net/core/link_watch.c:273
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627
 process_scheduled_works kernel/workqueue.c:2700 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=459c/1/0x4000000000000000 softirq=5845/5845 fqs=0
rcu: 	(detected by 1, t=10502 jiffies, g=6969, q=158 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5060 Comm: kworker/0:4 Not tainted 6.7.0-rc4-syzkaller-00843-g1674110c0dd4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: events linkwatch_event
RIP: 0010:__list_add include/linux/list.h:150 [inline]
RIP: 0010:list_add_tail include/linux/list.h:183 [inline]
RIP: 0010:__linkwatch_run_queue+0x28b/0x460 net/core/link_watch.c:225
Code: 4d fe ff ff e8 06 b1 10 f9 4c 8b 35 a7 d7 33 06 48 c7 c2 60 bc aa 8e 48 89 df 4c 89 f6 e8 7d cb f1 fb 31 ff 89 c6 88 44 24 08 <e8> 10 ac 10 f9 0f b6 44 24 08 84 c0 0f 84 91 fe ff ff e8 ce b0 10
RSP: 0018:ffffc9000414fc50 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffff888018b1c6a8 RCX: ffffffff8876e335
RDX: ffffffff8eaabc60 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 00000000000000bd
R13: 0000000000000001 R14: ffff888068e7e6a8 R15: ffff888018b1c6b0
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6b6bcc35c0 CR3: 000000006947e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 linkwatch_event+0x8f/0xc0 net/core/link_watch.c:273
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627
 process_scheduled_works kernel/workqueue.c:2700 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g6969 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=2082
rcu: rcu_preempt kthread starved for 10502 jiffies! g6969 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:27904 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6778
 schedule_timeout+0x137/0x290 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1631
 rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1830
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>